linux-kernel - Re: [PATCH] macvtap: remove wrong sock_put() in macvtap_put

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Message-Id: <20110616.225825.127982592225091945.davem@davemloft.net>
Date:	Thu, 16 Jun 2011 22:58:25 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	jasowang@...hat.com
Cc:	arnd@...db.de, netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] macvtap: remove wrong sock_put() in macvtap_put_queue()

From: Jason Wang <jasowang@...hat.com>
Date: Mon, 13 Jun 2011 11:15:19 +0800

> The calling of sock_put() should be delayed after synchronize_rcu(),
> otherwise inconsist data may be seen during packets transmitting.
> 
> Signed-off-by: Jason Wang <jasowang@...hat.com>

You're leaking sockets now.

This function has to release the socket twice if there is
a non-NULL vlan assigned to the queue.

Now you're only doing it once in that situation.

Which probably fixes your crash, but adds a socket leak.
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